Waldo a



Model!) W.- A. LOUD.

I PAWL AND RATGHET. No. 305,697. Patented Sept. 23, 1884.

x v I 6 WITNESSES V INVENTOR ATTO RN EY N. PETERS Phamumn m hw. Washi c4UNTTnn STATns PATENT @rrrcn,

IVALDO A. LOUD, OF SPRINGFIELD, MASSACHUSETTS, ASSIG'NOR TO THE BLAIRMANUFACTURING COMPANY, OF SAME PLACE.

PAWL AN D RATCH ET.

SPECIFICATION forming part of Letters Patent No. 305,697, datedSeptember 23, 1884.

Application filed July 14, 1894. (No model.)

1'0 all whom it may concern Be it known that I, -WALDO A. LOUD, acitizen of the United States, residing at Spring field, in the county ofHampden and State of Massachusetts, have invented new and use fulImprovements in Iawls and Ratchets, of which the following is aspecification.

My invention relates to an improved pawlan d-ratchet mech anism; anditconsists, in brief, [0 of a wheel having one'portion of its peripheryformed into a ratchetrwheel, and the other and contiguous portionprovided with raised cams, in combination with a hinged pawl arranged tohave one end come opposite to and engage with the ratchet, and its otherprovided with a cam-block to come opposite to and engage with the cams,the rotation of the pawls over a fixed ratchet-wheel, or the rotationofthe wheel inside of a pawl having a fixed hinge, operating to vibratethe pawl, through the alternate action of the ratchet and cam surfaces,to positively, and without the interposition of gravity or springs, forma mechanism for continuing rotation in one direction.

My invention is fully illustrated in the ac companying drawings, inwhich Figure 1 is a plan view of a wheel of my construction attached tothe face of a disk. Fig. 2 is a section on the line a a: of Fig. 1, andof ashell or pulley journaling two pawls and operatively arrangedrelative to the wheel. 3 is a plan view in partial section on 3 y ofFig. 2, and Fig. 4 is a perspective view of one pawl.

B is a wheel, having a portion of its pe-- riphcry divided into theratchet-teeth b, and the other portion into an equal number of cams, d.i

C is a disk, of which the wheel 13 is shown in the drawings to be anintegral part.

D is a shell journaling the pawls H H upon opposite sides of the axis ofwheels B, and presenting an outside pulley-surface, c. V

I is an axial shaft to the disk 0 and shell D.

The pawls II are formed substantially as shown in Fig. 4, to have thedetent or upon one end and the cam-block n upon the other, and relievedfrom its side to come opposite the cams (Z when the end m shall beopposite to the teeth 6.

y In the drawings the wheel 13 is shown spaced Fig."

into an uneven number of teeth and cams, so that the two pawls H H, asarranged, alter nately engage the ratchet surface of said. wheel at aninterval equal to one-half of the space between said teeth. In a wheelwith many teeth the pawls may be multiplied, to, in effect, have one oftheir number always in engage menttherewith. x

In operation the rotation of the disk 0 in its free direction willvibrate the pawls H H, each ratchet-tooth lifting one end of a pawl toclear it, and a cam coming into operation upon cam-block a to cause theend of a pawl which has just cleared a tooth to follow down 6 5 near tothe radial face of said tooth, the cams being so relatively arranged asto open atein said direction after the ratchet-teeth to depress a pawlwhere there is space for such depression. 7 Upon a reversal of disk 0the cams (I come into action to throw the free ends of the pawls near tothe radial face of the teeth and leave them there in the track of saidteeth to be engaged thereby, to so stop all reverse motion. Theengagement of a pawlis nearer synchronous with an attempt to reverse, asits detent end is nearer the radial face of a tooth, and, as abovestated, where two or more pawls are used in combination with a wheelhaving an uneven number of teeth, said engagement may be made, ineii'ect, instantaneous. The shell D may be fast to shaft I to, throughits rotation, impart revolution in one direction to the disk 0; or thedisk 0, receiving its rotation from shaft 1, may impart a similarmovement to the pawLbea-ring shell and pulley D. By these means Iprovide a pawl and ratchet in which the pawl is automatically andpositively vibrated independently of gravity or spring power. Now,having described my invention, what 1. The within-described improvedpawl and ratchet, consisting of a wheel having its periphery providedwith contiguous ratcl1et- 9 5 teeth and cams, in combination with a pawlhinged immediately to its ends to an independent support, and havingfree ends adapted to alternately engage with said ratchet-teeth and camsupon the rotation of the wheel, or of the pawl around the wheel-center,whereby the pawl is vibrated positively to permit or cause in rotationiii only one direction, substantially I rangedto said wheel to causethem simultzv as set forth. neously to be in different stages ofvibration, 1o

2. The combination, in a pawl and ratchet, as and for the purpose setforth.

of a wheel B havin its periphery divided L ,7 5 into an odd n un'iber ofteeth, I), and cams d, VALDO LOUD and two or more pawls, H H, providedwith \Vitnesses:

opposite ends, adapted to alternately engage R. F. HYDE,

with said teeth and owns, and relatively {llf- I J. D. GARFIELD.

